Just a couple of YATI: When the evil Kirk is telling us "I want to live," look at the close-up shot. His scratches are on the wrong side of his face! We are told that the temperature of the planet gets to 120 degrees below 0. Why are they using Fahrenheit? At -120 degrees Celsius, they would be long dead, as that is about -184 in Fahrenheit. So we could infer that they are, in fact, speaking in terms of Fahrenheit.

The first transporter accident (from what would be a very temperamental piece of technology) splits Kirk into good and bad halves. Cue a lot of overacting from William Shatner as 'bad Kirk'. A bit of subtlety might have made this a far more chilling story. Still, stories like this got me hooked when I first started watching, so there's something to be said for simple and easy to follow. Some of the remastered effects shots did stand out a little, but I'm sure I'll hardly notice in a few weeks. Finally, there's still the question of where the shuttlecraft were...